元宵= 节(日)
后= 外
柳吐芽 = 生枝 (柳 is a plant, when it sprouts will have stems/leaves etc)

3) 首尔来函(han2)。
Guess （汉人一）

Answer: 韩信

首尔= 韩(国)
函 = 信

He’s a famous historical figure in Han Dynasty, being very well-versed in military tactics and 兵法. Hates 楚国, 项羽 to the core and assisted 汉王, 刘邦 to defeat him with the popular “出尔反尔” myth. He is rumored to be a narrow-minded and revengeful person.

4) 下星期开始亮灯。
Guess （艺人）

Answer: 周初明

星期 = 周
开始 = 初
亮灯 = 明

Ah duhz…I guessed it’s a 周 but thought it has something to do with 亮.

5) 助伟联到台湾宣传。
Guess （成语）

Answer: 推陈出新

Guessed many will understand this.

Duhz…I thought it’s something to do with the 台.

灯谜 is really not easy to guess…no wonder they call it 射虎 too…because it’s like as difficult as shooting tiger. =.=”